/* * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include <common.h> #include <mpc8xx.h> flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ /*----------------------------------------------------------------------- * Functions */ static ulong flash_get_size (vu_long *addr, flash_info_t *info); static int write_word (flash_info_t *info, ulong dest, ulong data); static void flash_get_offsets (ulong base, flash_info_t *info); /*----------------------------------------------------------------------- */ unsigned long flash_init (void) { unsigned long size_b0, size_b1; int i; /* Init: no FLASHes known */ for (i=0; i < CFG_MAX_FLASH_BANKS; ++i) flash_info[i].flash_id = FLASH_UNKNOWN; /* Detect size */ size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]); /* Setup offsets */ flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); #if CFG_MONITOR_BASE >= CFG_FLASH_BASE /* Monitor protection ON by default */ flash_protect(FLAG_PROTECT_SET, CFG_MONITOR_BASE, CFG_MONITOR_BASE+monitor_flash_len-1, &flash_info[0]); #endif size_b1 = 0 ; flash_info[1].flash_id = FLASH_UNKNOWN; flash_info[1].sector_count = -1; flash_info[0].size = size_b0; flash_info[1].size = size_b1; return (size_b0 + size_b1); } /*----------------------------------------------------------------------- * Fix this to support variable sector sizes */ static void flash_get_offsets (ulong base, flash_info_t *info) { int i; /* set up sector start address table */ if ((info->flash_id & FLASH_TYPEMASK) == FLASH_AM040) { /* set sector offsets for bottom boot block type */ for (i = 0; i < info->sector_count; i++) info->start[i] = base + (i * 0x00010000); } } /*----------------------------------------------------------------------- */ void flash_print_info (flash_info_t *info) { int i; if (info->flash_id == FLASH_UNKNOWN) { puts ("missing or unknown FLASH type\n"); return; } switch (info->flash_id & FLASH_VENDMASK) { case FLASH_MAN_AMD: printf ("AMD "); break; case FLASH_MAN_FUJ: printf ("FUJITSU "); break; case FLASH_MAN_BM: printf ("BRIGHT MICRO "); break; default: printf ("Unknown Vendor "); break; } switch (info->flash_id & FLASH_TYPEMASK) { case FLASH_AM040: printf ("29F040 or 29LV040 (4 Mbit, uniform sectors)\n"); break; case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); break; case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); break; case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); break; case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); break; case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); break; case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); break; case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); break; case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); break; default: printf ("Unknown Chip Type\n"); break; } if (info->size >> 20) { printf (" Size: %ld MB in %d Sectors\n", info->size >> 20, info->sector_count); } else { printf (" Size: %ld KB in %d Sectors\n", info->size >> 10, info->sector_count); } puts (" Sector Start Addresses:"); for (i=0; i<info->sector_count; ++i) { if ((i % 5) == 0) { puts ("\n "); } printf (" %08lX%s", info->start[i], info->protect[i] ? " (RO)" : " "); } putc ('\n'); return; } /*----------------------------------------------------------------------- */ /* * The following code cannot be run from FLASH! */ static ulong flash_get_size (vu_long *addr, flash_info_t *info) { short i; volatile unsigned char *caddr; char value; caddr = (volatile unsigned char *)addr ; /* Write auto select command: read Manufacturer ID */ #if 0 printf("Base address is: %08x\n", caddr); #endif caddr[0x0555] = 0xAA; caddr[0x02AA] = 0x55; caddr[0x0555] = 0x90; value = caddr[0]; #if 0 printf("Manufact ID: %02x\n", value); #endif switch (value) { case 0x01: /*AMD_MANUFACT*/ info->flash_id = FLASH_MAN_AMD; break; case 0x04: /*FUJ_MANUFACT*/ info->flash_id = FLASH_MAN_FUJ; break; default: info->flash_id = FLASH_UNKNOWN; info->sector_count = 0; info->size = 0; break; } value = caddr[1]; /* device ID */ #if 0 printf("Device ID: %02x\n", value); #endif switch (value) { case AMD_ID_LV040B: info->flash_id += FLASH_AM040; info->sector_count = 8; info->size = 0x00080000; break; /* => 512Kb */ default: info->flash_id = FLASH_UNKNOWN; return (0); /* => no or unknown flash */ } flash_get_offsets ((ulong)addr, &flash_info[0]); /* check for protected sectors */ for (i = 0; i < info->sector_count; i++) { /* read sector protection at sector address, (A7 .. A0) = 0x02 */ /* D0 = 1 if protected */ caddr = (volatile unsigned char *)(info->start[i]); info->protect[i] = caddr[2] & 1; } /* * Prevent writes to uninitialized FLASH. */ if (info->flash_id != FLASH_UNKNOWN) { caddr = (volatile unsigned char *)info->start[0]; *caddr = 0xF0; /* reset bank */ } return (info->size); } /*----------------------------------------------------------------------- */ int flash_erase (flash_info_t *info, int s_first, int s_last) { volatile unsigned char *addr = (volatile unsigned char *)(info->start[0]); int flag, prot, sect, l_sect; ulong start, now, last; if ((s_first < 0) || (s_first > s_last)) { if (info->flash_id == FLASH_UNKNOWN) { printf ("- missing\n"); } else { printf ("- no sectors to erase\n"); } return 1; } if ((info->flash_id == FLASH_UNKNOWN) || (info->flash_id > FLASH_AMD_COMP)) { printf ("Can't erase unknown flash type - aborted\n"); return 1; } prot = 0; for (sect=s_first; sect<=s_last; ++sect) { if (info->protect[sect]) { prot++; } } if (prot) { printf ("- Warning: %d protected sectors will not be erased!\n", prot); } else { printf ("\n"); } l_sect = -1; /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; addr[0x0555] = 0x80; addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; /* Start erase on unprotected sectors */ for (sect = s_first; sect<=s_last; sect++) { if (info->protect[sect] == 0) { /* not protected */ addr = (volatile unsigned char *)(info->start[sect]); addr[0] = 0x30; l_sect = sect; } } /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* wait at least 80us - let's wait 1 ms */ udelay (1000); /* * We wait for the last triggered sector */ if (l_sect < 0) goto DONE; start = get_timer (0); last = start; addr = (volatile unsigned char *)(info->start[l_sect]); while ((addr[0] & 0xFF) != 0xFF) { if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { printf ("Timeout\n"); return 1; } /* show that we're waiting */ if ((now - last) > 1000) { /* every second */ putc ('.'); last = now; } } DONE: /* reset to read mode */ addr = (volatile unsigned char *)info->start[0]; addr[0] = 0xF0; /* reset bank */ printf (" done\n"); return 0; } /*----------------------------------------------------------------------- * Copy memory to flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) { ulong cp, wp, data; int i, l, rc; wp = (addr & ~3); /* get lower word aligned address */ /* * handle unaligned start bytes */ if ((l = addr - wp) != 0) { data = 0; for (i=0, cp=wp; i<l; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } for (; i<4 && cnt>0; ++i) { data = (data << 8) | *src++; --cnt; ++cp; } for (; cnt==0 && i<4; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } if ((rc = write_word(info, wp, data)) != 0) { return (rc); } wp += 4; } /* * handle word aligned part */ while (cnt >= 4) { data = 0; for (i=0; i<4; ++i) { data = (data << 8) | *src++; } if ((rc = write_word(info, wp, data)) != 0) { return (rc); } wp += 4; cnt -= 4; } if (cnt == 0) { return (0); } /* * handle unaligned tail bytes */ data = 0; for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { data = (data << 8) | *src++; --cnt; } for (; i<4; ++i, ++cp) { data = (data << 8) | (*(uchar *)cp); } return (write_word(info, wp, data)); } /*----------------------------------------------------------------------- * Write a word to Flash, returns: * 0 - OK * 1 - write timeout * 2 - Flash not erased */ static int write_word (flash_info_t *info, ulong dest, ulong data) { volatile unsigned char *addr = (volatile unsigned char*)(info->start[0]), *cdest,*cdata; ulong start; int flag, count = 4 ; cdest = (volatile unsigned char *)dest ; cdata = (volatile unsigned char *)&data ; /* Check if Flash is (sufficiently) erased */ if ((*((vu_long *)dest) & data) != data) { return (2); } while(count--) { /* Disable interrupts which might cause a timeout here */ flag = disable_interrupts(); addr[0x0555] = 0xAA; addr[0x02AA] = 0x55; addr[0x0555] = 0xA0; *cdest = *cdata; /* re-enable interrupts if necessary */ if (flag) enable_interrupts(); /* data polling for D7 */ start = get_timer (0); while ((*cdest ^ *cdata) & 0x80) { if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { return (1); } } cdata++ ; cdest++ ; } return (0); } /*----------------------------------------------------------------------- */